As a deity name
Name 549 of the Lakshmi Sahasranāma — Skanda Purana / Sanat Kumara Samhita, as taught by Sages Sanatkumara and Devotees
As a Hindi name
षष्ठी · noun · feminine
किसी पक्ष का छठा दिन । शुक्ल या कृष्ण पक्ष की छठी तिथि · षाडश मातृकाओं में से एक । देवसेना · कात्यायानी । दुर्गा — Śabdasāgara
षष्ठी · shashṭhī · s.f.
The sixth day of a lunar fortnight — Platts (1884), digital edition courtesy DSAL, University of Chicago, p. 728
षष्ठी · feminine
Shashti
षष्ठी · feminine
the possessive case, genitive case
Cited formation "षष्ठी" is षष्ठ + -ई: षष्ठ means "(f. -ā or -ī), Sixth", and the suffix -ई forms abstract nouns (fem.). CHD Basic Grammar App. I §8(14) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
Cited formation "षष्ठी" is षष्ठ + -ई: षष्ठ means "(f. -ā or -ī), Sixth", and the suffix -ई forms 'belonging to', 'having', 'coming from' (adjectives). CHD Basic Grammar App. I §9(6) — cited from the extracted rule table — base gloss: Platts (1884), digital edition courtesy DSAL, University of Chicago
a Hindi word, a tatsama: the Sanskrit word borrowed unchanged into Hindi षष्ठी — per Wiktionary’s etymology record
“Learned borrowing from Sanskrit षष्ठी (ṣaṣṭhī).” — per Wiktionary’s etymology record
ṣaṣṭhī (ī), f. See below
ṣaṣṭhī f. the sixth day of a lunar fortnight, MBh.; Hariv. &c.
As a Sanskrit word
Meaning
the sixth day of a lunar fortnight, &c.
Scripturally attested Verified derivationWhy this matches what you typed
M1 · same meaning "ṣaṣṭhī" is the nominative of "ṣaṣṭhin" — the same word in a different grammatical case.
M1 · same meaning "ṣaṣṭhī" is the feminine form of "ṣaṣṭha" — the same word with the feminine ending, recorded by the dictionary's own gender marker on that entry.
Related forms
Dictionary citations
ṣaṣṭhī (ī), f. See below
ṣaṣṭhī f. the sixth day of a lunar fortnight, MBh.; Hariv. &c.
a partic. Tithi when homage is offered to the sixth lunar digit, MW.
the sixth or genitive case, ŚrS.; Nir. &c.
N. of a partic. brick the length of which equals the 6th part of a man, Śulbas.
ṣaṣṭhin mfn. having a sixth, having or being the sixth (year &c.), W.
ṣaṣṭhin mfn. (-ṣṭhī-ṣṭhinī-ṣṭhi) Being or having the sixth (year, &c.) E. ṣaṣṭha, and ini poss. aff.
ṣaṣṭha mf(ī)n. sixth, the sixth (with bhāga or aṃśa m. ‘a sixth part’; with or scil. kāla m. ‘the sixth hour of the day, the sixth meal eaten at the end of a fast of three days’; ṣaṣṭhaṃ √ kṛ, ‘to eat such a meal’), AV. &c. &c.
ṣaṣṭha m. (scil. akṣara) the sixth letter i.e. the vowel ī, RPrāt.
Caveats
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